The packages API

Functions
	pkgs_pkgLoadCode (szCode, iFlag)
	Load a Scol code string in the current channel. More...
	pkgs_pkgLoadSafe (fPkg, iFlag)
	Load a package in the current channel. More...
	pkgs_pkgLoadSafeP (pPkg, iFlag)
	Load a package in the current channel. More...
	pkgs_pkgRemoveNLast (chn, n)
	Remove the N last loaded packages in a given channel. More...
	pkgs_pkgRemoveRecursive (chn, cbfun)
	Remove some last packages in a given channel to apply a callback. More...
	pkgs_pkgTest (pPkgName, cbfun)
	Test a package in the current channel next call a function. More...
	pkgs_pkgTestS (szCode, cbfun)
	Test a Scol code in the current channel next call a function. More...

Detailed Description

Package to load : lib/pkgs/pkg.pkg

Dependancies :

• lib/std/misc.pkg
• lib/std/string.pkg
• lib/std/list.pkg

Function Documentation

pkgs_pkgRemoveNLast	(	chn	,
		n
	)

Remove the N last loaded packages in a given channel.

Remarks

These packages are not released in memory.

Prototype : fun [Chn I] I

Parameters

Chn	: a channel (like _channel)
I	: the number of packages to remove

Returns

I : 0 if success, other thing if an error occurs

pkgs_pkgRemoveRecursive	(	chn	,
		cbfun
	)

Remove some last packages in a given channel to apply a callback.

Only if the callback returns 0, the recursion stops. Else, the recursion continues until all packages are removed.

Prototype : fun [Chn fun [Env S] I] I

Parameters

Chn	: a channel (like _channel)
fun	[Env S] I : the callback. It must return an integer (I). Its arguments are : Env : the new environment (so, without the laready removed packages) S : the last package name still loaded in this environment. If the environment is nil (all packages has been removed), this argument is nil too.

Returns

I : always the return of the callback.

pkgs_pkgTest	(	pPkgName	,
		cbfun
	)

Test a package in the current channel next call a function.

Prototype : fun [P fun [I P S] u0] u0

Parameters

P	: a read-file reference
fun	[I P S] u0 : the function to call. Its arguments are : I : 0 if no error, 2 if the file is invalid, incorrect or corrupted, else 1 P : the given read-file reference S : the returned error or nil if no error

Returns

u0 : always the return of the called function.

pkgs_pkgTestS	(	szCode	,
		cbfun
	)

Test a Scol code in the current channel next call a function.

Prototype : fun [S fun [I S S] u0] u0

Parameters

S	: a code string
fun	[I S S] u0 : the function to call. Its arguments are : I : 0 if no error, else 1 S : the given code S : the returned error or nil if no error

Returns

u0 : always the return of the called function.

pkgs_pkgLoadSafe	(	fPkg	,
		iFlag
	)

Load a package in the current channel.

The loading can be safe : in this case, the package is checked before to be loaded.

Prototype : fun [S I] [I S]

Parameters

S	: a filename of a package
I	: a flag : PKGS_PKG_SAFE to have a safe loading, PKGS_PKG_UNSAFE (or any other value) to have an unsafe loading.

Returns

[I S] : a tuple :

• I : 0 if success, other value else
• S : always nil if success, the string error if error (only with PKGS_PKG_SAFE flag)

pkgs_pkgLoadSafeP	(	pPkg	,
		iFlag
	)

Load a package in the current channel.

The loading can be safe : in this case, the package is checked before to be loaded.

Prototype : fun [P I] [I S]

Parameters

P	: a read package reference
I	: a flag : PKGS_PKG_SAFE to have a safe loading, PKGS_PKG_UNSAFE (or any other value) to have an unsafe loading.

Returns

[I S] : a tuple :

• I : 0 if success, other value else
• S : always nil if success, the string error if error (only with PKGS_PKG_SAFE flag)

pkgs_pkgLoadCode	(	szCode	,
		iFlag
	)

Load a Scol code string in the current channel.

The loading can be safe : in this case, the code is checked before to be loaded.

Prototype : fun [S I] [I S]

Parameters

S	: a Scol code
I	: a flag : PKGS_PKG_SAFE to have a safe loading, PKGS_PKG_UNSAFE (or any other value) to have an unsafe loading.

Returns

[I S] : a tuple :

• I : 0 if success, other value else
• S : always nil if success, the string error if error (only with PKGS_PKG_SAFE flag)